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w. H. LAUB-ACH. VALVE FOR GAS ENGINE( No. 77,887. Patented 81,888; 1888.

` new endg useful' Impyouemene in ami" opeltntion Letters-Patient' Nbr-77228?, ciated Apn'l l281 in .iff igea; muiing ige' anni reflent. WQM' MAY ooNeE-ENL '.lofenobieptllose skilled in Vthe rtto umkeand: use myinvention, Ijnowfproeeed tn deseriiteits construction- Si'iniiur letteiisfilnf'thedroninge refer. tu; like patte-.-

Thifeinlventiou b iongel-tq that lclaesfof engines-i' which' the/ motor iS oir exponll-ellin-vthefcyiimler by-I'the litted'tightlyto the innorfisunfaee ofits eu'pport d. Y

The bottom ofthe'v'uive-euppoxf d-y iee'losed; with the-exception of u. i'ireuizi'gnpeniijigg infrwhiehimayhe tted e ring, df', projecting some I ttied'istunco below the bottom. of-'the slpp oi't, witl1in whiciirlng enteren projection, e OfPS-llgdlj 01" Other convenient shope, from thoyliottom'of the 4disk-.veluezl,' for' the p'uiposeof`*guiding the s ame duiing its upward-ond'dmunwnrdmovemente. I A; ring; e; pla'eedupon `the topof the: #oliesupport di his i side beingr inclined.l thereto.

n flange;ef", proj eeting downward from itewinneredgm which flange ie providedwith o sereni-tiireodf coire spondingjwith-a sereivhen-dgn the upper-port of the inner-surfnet) of tlievlvesuppprtdihjinensol'lwhiehneiging-and to n s uicientextent toffe'rlu-guiiie foi-"the upper en'dl'of .the stem dmfof the vlyedfwhic'h Stem is bent to one-side', us slxovfnathgfar enough to nfordspace'forthe'rotation ofthe cams k k ofthe horizonte! huft e. A sharp tojoth, kf; is/vfornierl on .tiiefstem .d 'Qonthe-sieoppositetheeuidc uri'ed portion, for use in eonne'etiou With theenuie'k. i The en ms k are of wedgefshape, one sideof es .ch heilig pijallellwith thefaigie of the shufhb'a'nd thelother Theun-his nre- Mixed tea sleeve, m, eiidingonilthe sheftl; -thelntteigbejiig square-iiieues-seetiomerfe portion of its length, so os to insure therotation' eithesleeve m with the shui't'l,v I

for everyone of theniei'u ehaft, ifoue c am kisgempio'yfed.

The gas .used to dse'hurge-thebefore-mentioned;function entefs themochiue ettheiced." iiiztheb'ottom;

Vof the vulve-support d, and proceeds thence into the'cliom'ber e. 1 The air emoloyed in connsiion withtho goe' .Y

entere et theupporoeicrof'the'support-H, ulove the dislilvelve `cZ. 4A piece of wire gauzefmis stretched across the mouth of the chamber c, near the valved'lt-ofelect the inorcf'perfcet mixing o'- the,cnrrents of gas. und air. .A partition of buck-shot may be used instead of gauze, if desired. Y Y

The digk-velvc d controls the flow of the gas into the machine, While resting onits lower seat, it completely closes the orifice el, so thutjno gas can enter. It is raised from its lower seat by one of the cams 7..

The bevelled sides of Lthese-coms are inclined upward and' inward, by whieb means',.when such inclined sides i come in contact, duringV the revolutionof the shaft, with the inner curved side et' tho tooth It', the latter slips easily over theformer, undl tbe stem d, with thevalve d', -is raised oifrits lower s ent, admitting the gas. The valve d remains elevated until the com c pnssesthetooth'k The straight sides 'of 'the cams k are perpendicular,

i 'no that the montent tho upper surface of theear-n' passes1 from under .the tooth k the valve-stem d." and ralved fall und close ,tlieorificc du, shutting of the gas. o

The length oftime durng'wbiehmthe vixlve d reinains elevated, ars-Woll es' the pointottime when such elevation begins, ere governed by tbe position of the sleeve m o n `the shaft yln proportion nsftho tooth 7c" posses over a narrower or wider-part of the c'aio 7c,nn:l cornesin contact with o. point nearerto or farther from l the wide end of said com, the snid tooth remains elevated o longer oi' shorter time, ond su'eh elevation begins` s'oouer or later. t l

As regards the current of nir passing into the machine, it is evident that its volume is-controlled by the position of' the flange e with respect to.thp.vill;ev l. ymeons-effthe before-'mentioned aereo-threads, the ange o canbe adjusted et any'desiredlieight above saidilonge. I propose Vto,.stntime'it at such a. height-that the volume of air passing into the machine shell4 heobo'ut in the proportion of. nine toene with respect :to-the' volume of gos', which proportionl I consider productive oi' the highes'tfd'egree of-fcrce extractible {mmf-any compound of these elements. This proportion remains always the borne,whether the flow of gas continues for o longer orshorter period. l l y l l i Thecommunicution between the chamber e and the upper orificeV of theyalve-support is nlwnys to be kept open, sons ,to insureiree admission ot" nir atall times tothe latter; v

To set my engine in motionJ supposingtho piston to lbe at cnoen o5 #im cylinder; itv'is, irL'th-e first place, to be drown towards the centre by he.v d through the agency ot'- the ly"-wlieel. The slide-fvnive a is so arranged as Ito admita 'supply of air into the cylinder, behind the piston, from the beginning of 'the stroke. At the eornmencementof the str oke,tho sleeve m shouldjbe so placed as net to bring the comv k 'into operation, :rnd

thus admit gus until after the piston has passedV beyond nn'eigbth stroke, more er less.' The slide-valve a coinpletesits forward throw simultaneouslyivith the completion ot' o; quarter stroke by the piston, ond at once commands its return throw, which itcompletcs by the .time the piston finishes its half stroke. The volvecl rises at :myY desired point of the stroke, dnd admite gas,'7\vhich, passing throughthegzuzeofis mixed 'with air in the chan-,ber c', from which a current of the intermingled va'por entersthe cylinder until the slide-volvoy closes the orifice a or a. A f Y i An electric batrery,at this moment, by mean's oi' o' suitable meeha'nism,inot here described, causes the ignitionI off` the gas, the wire which communicates the spark ending in the passages "a' a, where the goeie certain to be, by reason of its entering at that point at the insta'ntof the advent ofthe electr-ic influence, the iiow of the combined currents of gos and oir-being always' synchronous with the lest part of return throw of" the slidc-vulve. v

The commencement oi"sucl1A flow may be made simultaneous with that of th'offorward throw of the slidevalve, it' desired,th us' admitting a combined cui-"rent of gas-md air ifrfn the very beginning of the stroke of the piston, simply by setting sleeve m in such position on the shaft l thzit the widest'parts of the cams 7c nre brought into contact with the tooth k; a v y v s i The combustion of .the gestokes place, ns before described, when the piston has completed u half stroke, which combustion eirpr'mds 'the uir in the cylinder iii; thetime, by the force of" which expansion the strol-e is completed. i y V 'i Itis n'ecesserylto the proper operation of' my engine that oir alone should enter the cylinder et the beginning. of the stroke, in order that the carbonio-acid gosA resulting from former combustiona..mrd remaining in'the cylindex', may be duly disposed of. l vl Thopoint :it which'tlze commingled current of gas and oir enters the cylinder is controlled by tbegovcrnor of the' engine, which is suitably connected with the sleeve m. I

Having thus described nly invention, what l claim as new, and desire tosecure by Letters Patent, is

The devices herein described, consisting of'the slidingsleeve m, provided with the come' 7c, lconstructed. as described, the lever '11 sheftl, valve d', and stem d, with its tooth kf, `for regulating the o'w of o, coizbined current of gas "and oir, alternately with air alone, into the cylinder of a 'ges-engine; in such o. manner that the former current shell continue te iow until the' closing ofA the induction-port and the moment of the ignition of snifgas, substantially as described. i i

w. H. LAUBACH.

Witnesses:

Gso. H. MELLBN, Gre. E. Baer/N. 

